public void ShouldReturnOpenDoorOnStateChange()
{
//assign
IDoor closedDoor = new ClosedDoor();
//act
IDoor openDoor = closedDoor.ChangeState();
//assert
openDoor.IsOpen().Should().BeTrue();
}
public void ShouldShowDoorAs_Closed()
{
//assign
IDoor door = new ClosedDoor();
//act
bool isOpen = door.IsOpen();
//assert
isOpen.Should().BeFalse();
}